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  Interactive Cloud Rendering Using Temporally-coherent Photon Mapping

Elek, O., Ritschel, T., Wilkie, A., & Seidel, H.-P. (2012). Interactive Cloud Rendering Using Temporally-coherent Photon Mapping. In S., Brooks, & K., Hawkey (Eds.), Graphics Interface 2012 (pp. 141-148). Toronto, Canada: Canadian Information Processing Society.

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資料種別: 会議論文

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 作成者:
Elek, Oskar1, 著者           
Ritschel, Tobias1, 著者           
Wilkie, Alexander2, 著者
Seidel, Hans-Peter1, 著者           
所属:
1Computer Graphics, MPI for Informatics, Max Planck Society, ou_40047              
2External Organizations, ou_persistent22              

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 要旨: This paper presents an interactive algorithm for simulation of light transport in clouds. Exploiting the high temporal coherence of the typical illumination and morphology of clouds we build on volumetric photon mapping, which we modify to allow for interactive rendering speeds --- instead of building a fresh irregular photon map for every scene state change we accumulate photon contributions in a regular grid structure. This is then continuously being refreshed by re-shooting only a fraction of the total amount of photons in each frame. To maintain its temporal coherence and low variance, a low-resolution grid is used, and is then upsampled to the density field resolution in each frame. We also present a technique to store and reconstruct the angular illumination information by exploiting properties of the standard Henyey-Greenstein phase function, namely its ability to express anisotropic angular distributions with a single dominating direction. The presented method is physically-plausible, conceptually simple and comparatively easy to implement. Moreover, it operates only on the cloud density field, thus not requiring any precomputation, and handles all light sources typical for the given environment, i.e. where one of the light sources dominates.

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言語: eng - English
 日付: 2012-05
 出版の状態: 出版
 ページ: -
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 目次: -
 査読: -
 識別子(DOI, ISBNなど): BibTex参照ID: Elek2012a
その他: Local-ID: 3CB9A3047BF33EE2C1257AF000674820-Elek2012a
 学位: -

関連イベント

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イベント名: Graphic Interface 2012
開催地: Toronto, ON, Canada
開始日・終了日: 2012-05-28 - 2012-05-30

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出版物 1

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出版物名: Graphics Interface 2012
  省略形 : GI 2012
  副タイトル : Proceedings ; 28 - 30 May 2012, Toronto, Ontario, Canada
種別: 会議論文集
 著者・編者:
Brooks, Stephen1, 編集者
Hawkey, Kirstie1, 編集者
所属:
1 External Organizations, ou_persistent22            
出版社, 出版地: Toronto, Canada : Canadian Information Processing Society
ページ: - 巻号: - 通巻号: - 開始・終了ページ: 141 - 148 識別子(ISBN, ISSN, DOIなど): ISBN: 978-1-4503-1420-6
ISSN: 0713-5424